Mixer for comminuted material.



H. B; PRUDEN.

MIXER FOR GOMMINUTED MATERIAL.

APPLICATION FILED FEB.28, 1914.

1,120,534. Patented Dec.8,1914.

an era as Penna orator."

HARRY B. PRUDEN, OF NEW CASTLE, PENNSYLVANIA.

MIXER FOR COMMINUTED MATERIAL.

Specification of Letters Patent.

Patented nee. s, 1914.

Application filed February 28, 1914. Serial No. 821,787.

' a blast of air.

-he principal object of the invention is to improve and simplify the general construction of devices of this character.

A second object of the invention is to provide an improved arrangement for mixing the material with the air blast so that the mixture of air and comminuted material will be uniform throughout.

Another object of the invention is to so arrange the mixing device that it will be actuated by the air blast.

IVith the above and other objects in view the invention consists in general of certain novel details of construction and combination of-parts hereinafter fully described, illustrated in the accompanying drawings; and specifically claimed.

In the accompanying drawings, likechar actors of reference indicate like parts in the several views, and :-Figure l is a vertical longitudinal section through one side of the mixing device and feeder adapted to be used in connection with this device. Fig. 2 is a similar view showing a modified form ofmixing device and feeder. Fig. 3 is a section through a feed pipe and hopper showing one forni of means for causing the comminutedmaterial to enter the feed pipe. Fig. 4c is a view similar to Fig. 3 but showing a slight modification of the hopper, the view being arranged in proper relation to 2. Fig. 5 is a section through a screw feeding device adapted for use in connection with this invention. F ig. 6 is a section through an injector, the view being a section on the line 6-6 of Fig. 2.

In both the form shown in Fig. 1 and the form shown in Fig. 2 there is provided a 10 which is in the form of a hollow body, truncated at both ends. To one end of this body, which is provided with a flange 11. is secured the low pressure air pipe 12 which is arranged to beconnected to a. suitable low pressure blower, not deemed necessary to be shown, but giving an air pressure of, for instance, about 8 ounces. The other end of the casing 10 is provided with a flange 13 to which is secured the flange 1st of a flaring mouth of nozzle 15.

V\ ithin the-casing 10 at each end thereof is secured a spider 16 on the center of which is formed a bearing 17. These. bearings 17 are in alinement and serve to support the longitudinally extending shaft 18 whereon are mounted the propellers 19. These propellers are so arranged that the central pro.-

peller is larger than those of the ends.

WVithin the casing 10 are arranged a-series ofbafiles 20 which are inclined toward-the nozzle 15 as clearlv shown in Figs. land In the form of the device shown .in Fig. 1 there is provided a gravity feed pipe 21 which extends through the casing and terminates just to the rear of the rearmost propeller 19. In this form there is also provided a high pressure blast pipe 22 which has branches 23 extendinginto the casing 10 and so arranged that the air from these branches impinges against the blades of the propellers 19 thus causing said propellers to rotate, this action being assisted by the [low of air through the pipe 12.

In the form of the device shown in Fig. 2 i

there is provided on the shaft 18 an impulse wheel Ql and from the high pressure blast pipe 25 extends a pipe 26 which de- 9% so as to rotate the shaft 18 and conse: quentlv rotate the propellers. This action is furthermore assisted by means ofthe diagonal pipe 27 which branches oil? from the pipe 25 and delivers a jet of air against the rearniost propeller 19. It is to be noted that the pipes 27 and 23 are each inclined so as to be parallel to the bafile plates 20.- In

. livers a jet of air against the impulse wheel order to feed material to the delivery pipe 21 the device shown in F ig. may be used. In this device there is provided a hopper 28 having thereinan agitator 29 and from the 1O 1 hopper 33 throughlthe bottom of which dehave siphonic feed the devices shown in' wheel 32, the'latter being driven by any suitable machinery which may be deemed necessary. This form of feed is best adapted for. gravity fe'ed- Vhere it is desired to Figs. 3,4 and 6 may be used. In the device shown in Fig. 3 there is provided a pends a high pressure air tube 34 controlled by a valve35. This tube extends upward into a goose nek 36 which is connected with the delivery tube of the device. The tube 34 being smaller than the tube 36 the blast of air delivered from the tube 34 will, by an injector action cause the comminuted material contained in the hopper 33 to pass up into this tube. Furthermore this action is assisted by means of a ring tube 37 which is connected to, a high pressure pipe 38, the J ring tube being perforatedso that the jets of air issuing therefrom will keep the material in the hopper in a state of. agitation thus preventing caking and clogging.

In Fig. 4 is disclosed another formof arranged at one end'of the casing, a horihopper which has a cup shaped bottom.

This hopper is indicated at 39 and the cup.

shaped bottom at 40, In this form it is preferred to use the ring tube-41 perforated as Fig. 3 and supplied with air through a tube 42. Leading up from the cup shaped botto m.40 is agoose'neck 43., 'When this" form of the device is used it is preferred-to cbnnect thisv goose neck with such a delivery pipe as44 in Fig. 2. This delivery pipe 44 v is connected to a T fitting 45 the pipe entering the side through a suitable nipple '46. This .T fitting is provided with an injector; nozzle 47 which is connected to an air pipe 48 provided with a suitable valve 49. In the fitting 45 is also the usual Venturi tube 48 for the delivery of materiah'this tube 48 extending through the'casing 10 in Fig.2., I In all of these forms when the material is delivered through the delivery tube, either gravity as in Fig. l or by the injector devices as illustrated in Figs. 3 and 6, the latter giving a siphonic action, this material is fed into the casinglO and there meets the low pressure air blast coming through the pipe 12.

when it is delivered out of the nozzle 15 it is I practically in the-form of a cloud of uni-- form density throughout; There has thus This causes the material to be, driven toward the delivery end of the case I been provided a simple and eflicient device of the kind described and of the character specified. I

It will be obvious that many minor changes may be made in the form and con struction of this invention without departing from the material principles thereof.

It is not therefore desired to confine the inventionto the exact form herein shown. and

described, but it is wished to include all such as come properly within the scope claimed. Having thus descrlbed the invent on, What is claimedas new, is

1. In an apparatus for mixing feeding comminuted material, a casing provided.

with a fuel and air inlet. arranged at one end, a horizontalair pipe connected to said end of the casing, a shaft journaled in said easing' andextending through the longituv i dinal center thereof, agitator propellers mounted on said shaft, and an air pressure pipe extending through the casing and arpropellers whereby 2. In an apparatus for mixing coinininuted material, a casing, a fuel andair feeder ranged to deliver air againstjone of'said v to rotate the agitators propellers and shaft.

zontally disposed agitator shaft arranged in the casing, and pressure-air pipes extending into the casing and arranged tov rotate the shaft and agitate the material and air de-. livered through the feeder.

In an apparatus for mixing comminuted material, a casing, a'feeder projecting in one. end of the casing and arranged; to

., deliver a mixture ofmaterial and air thereto, a horizontally disposed agitator shaft arranged in the casmg, pressure ai'r pipes extending into the casing and arranged to 3 i 1.05

agitate the mixture of material andair and to rotate the shaft, and a siphonic delivery 1 device connected to said feeder.

ion

4. In an ap'paratus'for mixing .comminuted material, a casing, a supply connected 'to said casing 'andarranged todeliver a.

mixture ofair and comminuted material thereto, an agitatorin said casing-and high said casing against'the walls thereof and inclined toward the outlet end of thecasing,

and air pipes pro'ecting into the casing and arranged ,paralle With said baffle plates.

6. In a. device for mixing comminuted material, a casing, an agitatorshaft extending longitudinally in said casing, agitator propellers mounted on said fsliaft, an impulse wheel fixed, upon said shafta h gh p essure iio air pipe, a branch extending frem said High pressure air pipe inte said casing and arend of the casingand extending into said casing to deliver eiri 'against me of said agitator propellers; in combination with means to supply a mixture'of ail" and com-1 minuted material to the casing.

in presence of'twe witnesses. HARRY B.-PBUDEN.

Witnesses:

",FRANGISSEMAGUIRE,

M. H. SNYDER.

10' In testimony whereof I affix my slgnature 

